- Fixed the QueryBuilder's escaping problem - adapters are now responsible for escaping identifiers.

- Added a MsSQL offset query fragment. There is still a problem with the way the Repository must act within another adapter.

src/Common/Sql.php

@@ -44,17 +44,13 @@ abstract class Sql {
     {
         switch(true) {
             case is_object($value):
-                # @TODO Make sure the object is a Field
                 return (string) $value;
-            break;
 
             case is_string($value):
-                $value = "\"$value\"";
-            break;
+                return "'$value'";
 
             case is_null($value):
-                $value = "NULL";
-            break;
+                return "NULL";
         }
 
         return $value;